/Engine/Source/Runtime/Engine/Classes/Animation/AnimInstance.h
Anim getters support a number of automatic parameters that will be baked at compile time to be passed to the functions. They will not appear as pins on the graph node. They are as follows: AssetPlayerIndex -Indexof an asset player node to operate on, one getter will be added to the blueprint action list per asset node available MachineIndex -Indexof a state machine in the animation blueprint, one getter will be added to the blueprint action list per state machine StateIndex -Indexof a state inside a state machine, also requires MachineIndex. One getter will be added to the blueprint action list per state TransitionIndex -Indexof a transition inside a state machine, also requires MachineIndex. One getter will be added to the blueprint action list per transitionGets the length in seconds of the asset referenced in an asset player node
float GetInstanceAssetPlayerLength ( int32 AssetPlayerIndex )